question about VVEL, throttlebody, and drive by wire...
Originally Posted by Modshack
Your whole premise is incorrect. Each throttle body has an electronic control actuator that opens/shuts the throttle body plate based on torque requests from the drive
Your whole premise is incorrect. Each throttle body has an electronic control actuator that opens/shuts the throttle body plate based on torque requests from the drive by wire system. You cannot finely control engine speed with camshaft rotation alone. You must be able to control the Air to adjust engine speed. The throttle body plates do that and are only wide open when you go WOT with the gas pedal..
You are right that you can't finely control engine speed with camshaft rotation but this engine doesn't have an intake camshaft. The intake side is electronically controlled. The video shown here dmonstrates that even at partial throttle conditions the throttle plates remain wide open allowing the valves to control air flow into the cylinder. The orange blocks refer to throttle pressure.
07-26-2009, 12:58 PM
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